feat: add inspect blob commands

[rrsemlani]

Adding inspect blob commands. Spec Pr used for ref: https://github.com/notaryproject/notation/pull/811

[priteshbandi]

Also as per spec we have a new field called signature envelope type. Please add support for it in both oci and blob inspect command.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 68.68132% with 57 lines in your changes missing coverage. Please review.

Project coverage is 71.05%. Comparing base (eaa5fb4) to head (3ee161f). Report is 71 commits behind head on main.

Files	Patch %	Lines
cmd/notation/internal/outputs/inspect.go	70.53%	23 Missing and 10 partials :warning:
cmd/notation/blob/inspect.go	47.50%	21 Missing :warning:
cmd/notation/internal/osutil/read.go	86.66%	1 Missing and 1 partial :warning:
cmd/notation/inspect.go	80.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #888      +/-   ##
==========================================
+ Coverage   64.93%   71.05%   +6.12%     
==========================================
  Files          45       49       +4     
  Lines        2729     2246     -483     
==========================================
- Hits         1772     1596     -176     
+ Misses        795      453     -342     
- Partials      162      197      +35     

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[github-actions[bot]]

This PR is stale because it has been opened for 45 days with no activity. Remove stale label or comment. Otherwise, it will be closed in 30 days.

[github-actions[bot]]

This PR is stale because it has been opened for 45 days with no activity. Remove stale label or comment. Otherwise, it will be closed in 30 days.

[github-actions[bot]]

PR closed due to no activity in the past 30 days.